Guest posting is one of the best way to drive traffic to a new blog. It may take a time to write a good post but list of benefits is very long. Initially you may not too much traffic from the post but search engine traffic will surely increase.
Commenting on other blogs can also bring traffic to your blog. If you leave quality comments, Blog owner will visit your blog and comment. If you spent 20 to 30 minutes on commenting on comment in 10 to 15 blogs, You can expect 10 to 60 Visitors.